Kustomer API
Kustomer has a fully documented public REST API at developer.kustomer.com covering customers, conversations, messages, custom objects, and reporting. Auth is API keys or OAuth 2.0 for installable apps, with plan-tiered rate limits from 300 to 2,000 requests per minute.
Frequently asked questions
Kustomer scores A on Supergood's API Report Card. Kustomer has a fully documented public REST API at developer.kustomer.com covering customers, conversations, messages, custom objects, and reporting. Auth is API keys or OAuth 2.0 for installable apps, with plan-tiered rate limits from 300 to 2,000 requests per minute.
Kustomer has a workable official integration path. Most engineering teams can build against it directly. Open API: self-serve, documented, with SDKs
Kustomer is an AI-native customer service CRM that unifies customer interactions across email, chat, SMS, voice, social, and messaging apps into a single conversation-and-customer timeline.
Horizontal customer service / CX software with strong skew toward direct-to-consumer brands, marketplaces, on-demand delivery, travel, and fintech. Teams use Kustomer to (1) consolidate omnichannel conversations (email/chat/SMS/WhatsApp/IG/FB Messenger/voice) onto one customer timeline, (2) deflect contacts with AI Agents and KB self-service, (3) route and triage with workflow/business rules and queues, (4) give agents a 360 view enriched with Shopify orders, Klaviyo segments, shipping events, and loyalty data, and (5) report on CSAT, resolution times, and agent productivity.
Moderate. Kustomer reports ~600 customers, much smaller than Zendesk (100k+) or Freshdesk (74k+), but with disproportionate brand recognition among DTC/e-commerce CX teams thanks to high-profile logos and the Meta acquisition.
For any consumer brand, the Kustomer API is the operational heartbeat of customer experience: every conversation across every channel, every message body, every customer record with attached orders/shipments/loyalty data, every KObject (custom object) carrying business-specific data, agent activity, queues, SLAs, satisfaction surveys, and KB content.
Founded in 2015 in New York by Brad Birnbaum and Jeremy Suriel (both ex-Assistly/Desk.com). Acquired by Meta in early 2022 for ~$1B, then spun back out as an independent company in late 2023 with backing from Battery Ventures.
Supergood's grades measure one thing: can a customer's engineering team get their own data out programmatically? Supergood checks six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and rolls them into a letter grade. Supergood re-verifies grades, and they only move on evidence.
Not that we could find. As of August 2026 there is no official Kustomer MCP server in any public registry, and no maintained community server we're aware of. We re-verify this periodically — report an inaccuracy below if we missed one.
Not natively. Kustomer doesn't publish an MCP server, so MCP clients like Claude, Cursor, and Codex have nothing to connect to out of the box. If that changes, this page will reflect it.